A network communication system and a source device thereof. The source device may include a cluster manager that groups a plurality of connections between the source device and the plurality of destination devices into clusters, such as performance clusters. The cluster manager may also remove one or more of the destination devices that do not respond within a timeout threshold from their clusters, and when the removed one or more destination devices respond to the timeout threshold, the cluster manager may provide one or more of the plurality of destination devices full-buffer updates until such point as a recent average latency performance of a responding destination device is at a level that merits insertion back into one of the clusters.